<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }" @click="clearSeeion">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="rolesList" border stripe row-key="id">
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1===0?'bdtop':'','vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <el-row
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                  :class="[i2===0?'':'bdbottom','vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              size="mini"
            >编辑</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              @click="removeUserById(scope.row.id)"
              size="mini"
            >删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showRightDialog(scope.row)"
            >分配权限</el-button>

            <!-- 分配权限对话框 -->
            <el-dialog title="分配权限" :visible.sync="setRigthDialogVisible" width="50%">
              <!-- 树形控件 -->
              <el-tree
                :data="rightsList"
                :props="treeProps"
                show-checkbox
                ref="treeRef"
                node-key="id"
                default-expand-all
                :default-checked-keys="defaultKeys"
              ></el-tree>
              <span slot="footer" class="dialog-footer">
                <el-button @click="setRigthDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="setRigths">确 定</el-button>
              </span>
            </el-dialog>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRigthDialogVisible: false,
      rightsList: [],
      treeProps: {
        children: "children",
        label: "authName"
      },
      defaultKeys: [],
      // 所选中角色的ID
      roleId: ""
    };
  },
  methods: {
    clearSeeion() {
      window.sessionStorage.setItem("activePath", "");
    },
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表失败！");
      }
      this.rolesList = res.data;
    },
    // 删除权限
    async removeRightById(role, rightId) {
      const res = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (res !== "confirm") {
        return this.$message.info("取消删除！");
      }
      const { data: result } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (result.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      this.$message.success("删除权限成功！");
      // this.getRolesList();
      role.children = result.data;
    },
    // 展开分配权限对话框
    async showRightDialog(role) {
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表失败！");
      }
      this.roleId = role.id;
      this.rightsList = res.data;
      this.defaultKeys = [];
      this.getLeafKeys(role, this.defaultKeys);
      this.setRigthDialogVisible = true;
    },
    // 获取所有三级权限
    getLeafKeys(node, arr) {
      // 如果当前节点布包含children属性，就是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr);
      });
    },
    // 分配权限
    async setRigths() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {rids:idStr}
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRigthDialogVisible = false;
    }
  },
  created() {
    this.getRolesList();
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: solid 1px #eee;
}
.bdbottom {
  border-top: solid 1px #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>